... narrowing circuit 变窄脉冲电路 spectal narrowing 频谱收缩 narrowing cutter 阀座铣刀 ...
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检测肿瘤内部的血流频谱，记录收缩期峰值流速(PSV)和阻力指数(RI)。
Detection of tumor blood flow within the spectrum, recorded peak systolic velocity (PSV) and resistance index (RI).
病变对侧va呈收缩期血流速度增快的高阻力频谱。
High resistance waveform with increased flow velocity was seen in contralateral VA.
应用经食管超声心动图测量肺静脉血流频谱曲线收缩早期逆向R波峰值流速（PVR）和收缩期S波峰值流速（PVS） ，分析PVR和PVS与其前心电图R R间期的关系。
The peak velocities of the early systolic reversal wave (PVR) and the systolic forward wave (PVS) were measured. The relationships between the preceding R-R intervals and PVR, PVS were analyzed.
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